How is an outdoor thermostat used in a dual-fuel heat pump system?
A) The outdoor thermostat prevents the heat pump from operating above the balance point.
B) The outdoor thermostat prevents the furnace from operating above the balance point.
C) The outdoor thermostat prevents the heat pump from defrosting above the balance point.
D) The outdoor thermostat prevents the electric strip heat from operating above the balance point.
B
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In the private living area of the home, the bedrooms comprise the major rooms of this area
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Which method enables ultraviolet (UV) lamps to be able to kill the maximum number of microbes in a duct
system? a. Install UV lamps in the airstream ahead of an EAC. b. Constantly bathe the evaporator coil with UV light. c. Cycle the UV lamps on and off with the furnace blower. d. Install UV lamps in the return air duct airstream.
In the areas where ____ is enforced, the NEC® is the law.
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